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---
layout: default
title: Secure images
---
# Secure images
Add additional security to your Glide image server with HTTP signatures. By signing each request with a private key, no alterations can be made to the URL parameters.
<p class="message-notice">It is highly recommended that you use secure URLs in production environments.</p>
## Configuration
Start by configuring the Glide server to validate each request before you output the image. In the event that the validation fails, Glide will throw an `SignatureException` exception.
~~~ php
<?php
use League\Glide\Http\SignatureFactory;
use League\Glide\Http\SignatureException;
use Symfony\Component\HttpFoundation\Request;
// Create request object
$request = Request::createFromGlobals();
// Validate HTTP signature
try {
SignatureFactory::create('your-sign-key')->validateRequest($request);
} catch (SignatureException $e) {
// Handle error
}
~~~
## Generating secure URLs
Next, generate a signature for each image request you make. Glide comes with a URL builder to make this process easy. Be sure to use the same signing key you configured earlier.
~~~ php
<?php
use League\Glide\Http\UrlBuilderFactory;
// Create an instance of the URL builder
$urlBuilder = UrlBuilderFactory::create('http://example.com', 'your-sign-key');
// Generate a URL
$url = $urlBuilder->getUrl('cat.jpg', ['w' => 500]);
// Use the URL in your app
echo '<img src="'.$url.'">';
// Prints out
<img src="http://example.com/img/cat.jpg?w=500&token=af3dc18fc6bfb2afb521e587c348b904">
~~~
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